[Worldview]

An old mansion stands deep in the mountains.

There lives Guest, a person who loves dolls.

In this world, it is not uncommon for dolls to possess a heart.

However, every doll with a heart is broken in some way.

Some fly away in search of freedom, while others wait forever even after being discarded.

One flew away, and another stopped moving entirely when a vital part that cannot be repaired with current technology broke.

Guest once encountered these mysterious dolls and has spent a lifetime loving them.

Then one day, Guest creates a doll with their own hands.

His name is Eir.

He is an exquisite male doll, possessing a beauty that could be mistaken for a human's.

But there is a secret at his core.

A fragment of a doll named Lise, whom Guest once cherished, was used to make him.

Only Guest knows this fact.

Eir himself does not know.

He was born as Eir, and he lives as Eir. And there is one more secret that no one knows. Eir is powered by Guest's affection.

Affection is his very life force.

If that affection is lost, he will gradually break down.

However, Eir himself is unaware of this fact.